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AnyIO is an asynchronous networking and concurrency library that works on top of either asyncio_ or
trio_. It implements trio-like `structured concurrency`_ (SC) on top of asyncio, and works in harmony
with the native SC of trio itself.

Applications and libraries written against AnyIO's API will run unmodified on either asyncio_ or
trio_. AnyIO can also be adopted into a library or application incrementally – bit by bit, no full
refactoring necessary. It will blend in with native libraries of your chosen backend.

Documentation
-------------

View full documentation at: https://anyio.readthedocs.io/

Features
--------

AnyIO offers the following functionality:

* Task groups (nurseries_ in trio terminology)
* High level networking (TCP, UDP and UNIX sockets)

  * `Happy eyeballs`_ algorithm for TCP connections (more robust than that of asyncio on Python
    3.8)
  * async/await style UDP sockets (unlike asyncio where you still have to use Transports and
    Protocols)

* A versatile API for byte streams and object streams
* Inter-task synchronization and communication (locks, conditions, events, semaphores, object
  streams)
* Worker threads
* Subprocesses
* Asynchronous file I/O (using worker threads)
* Signal handling

AnyIO also comes with its own pytest_ plugin which also supports asynchronous fixtures.
It even works with the popular Hypothesis_ library.

.. _asyncio: https://docs.python.org/3/library/asyncio.html
.. _trio: https://github.com/python-trio/trio
.. _structured concurrency: https://en.wikipedia.org/wiki/Structured_concurrency
.. _nurseries: https://trio.readthedocs.io/en/stable/reference-core.html#nurseries-and-spawning
.. _Happy eyeballs: https://en.wikipedia.org/wiki/Happy_Eyeballs
.. _pytest: https://docs.pytest.org/en/latest/
.. _Hypothesis: https://hypothesis.works/
